error[E0521]: borrowed data escapes outside of closure --> $DIR/regions-nested-fns.rs:12:9 | LL | let mut ay = &y; | ------ `ay` declared here, outside of the closure body ... LL | ignore:: FnMut(&'z isize)>>(Box::new(|z| { | - `z` is a reference that is only valid in the closure body ... LL | ay = z; | ^^^^^^ `z` escapes the closure body here error[E0597]: `y` does not live long enough --> $DIR/regions-nested-fns.rs:5:18 | LL | let mut ay = &y; | ^^ borrowed value does not live long enough ... LL | if false { return ay; } | -- returning this value requires that `y` is borrowed for `'static` ... LL | } | - `y` dropped here while still borrowed error[E0597]: `y` does not live long enough --> $DIR/regions-nested-fns.rs:10:15 | LL | ignore:: FnMut(&'z isize)>>(Box::new(|z| { | --- value captured here LL | ay = x; LL | ay = &y; | ^ borrowed value does not live long enough ... LL | if false { return ay; } | -- returning this value requires that `y` is borrowed for `'static` ... LL | } | - `y` dropped here while still borrowed error: lifetime may not live long enough --> $DIR/regions-nested-fns.rs:17:27 | LL | fn nested<'x>(x: &'x isize) { | -- lifetime `'x` defined here ... LL | if false { return x; } | ^ returning this value requires that `'x` must outlive `'static` error: aborting due to 4 previous errors Some errors have detailed explanations: E0521, E0597. For more information about an error, try `rustc --explain E0521`.